Filling slurry containing waste concrete aggregate and used for coal mine

A technology for waste concrete and filling slurry is applied in the field of filling slurry, which can solve the problems that the quantity of filling and mining raw materials cannot meet the demand, restrict the full implementation of filling and mining technology, etc., so as to meet the requirements of fluidity and strength and be beneficial to the protection of the environment. , the effect of increasing strength
CN107285702AActive Publication Date: 2017-10-24GUYAN TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUYAN TECH DEV CO LTD
Publication Date
2017-10-24

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Abstract

The invention discloses filling slurry containing waste concrete aggregate and used for coal mine. The filling slurry is composed of, by mass, 8-12% of cement, 18-22% of fly ash, 24-28% of coal gangue, 22-26% of the waste concrete aggregate and the balanced being water. The invention develops filling slurry, in which coarse and fine waste concrete aggregates are employed for replacing coal gangue, for application to coal mine goaf, wherein the filling slurry can satisfy demands of flowability and strength of filling of coal mines. Because a large quantity of the coarse and fine waste concrete aggregates are employed, the invention supplies a good solution scheme for treatment of urban concrete construction wastes, which is beneficial to environment protection. In addition, strength of the filling slurry is higher than that of the coal gangue in the prior art, thereby further improving safety of coal mines.
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Description

technical field

[0001] The invention relates to a filling slurry mixed with waste concrete aggregates for coal mines. Background technique

[0002] Paste filling technology was first developed in Grund lead-zinc mine in Germany in 1979. Due to the high slurry concentration, high filling efficiency and low cost of paste filling, this technology has been quickly adopted in metal mines after the successful test. The development has been applied in many countries including our country. Solid waste paste filling is not moved to village coal mining, that is, coal gangue and fly ash near the coal mine are processed on the ground into a toothpaste-like slurry that does not need dehydration treatment, and the filling pump or gravity pressure is used to transport it to the Underground, timely fill the goaf or separated layer area to form an overlying rock support system mainly composed of paste filling body, effectively control the surface subsidence within the allowable value of the...

Claims

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